-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
#include "in-addr-util.h"
#include "siphash24.h"
#include "string-util.h"
+#include "unaligned.h"
#define DHCP_DEFAULT_LEASE_TIME_USEC USEC_PER_HOUR
#define DHCP_MAX_LEASE_TIME_USEC (USEC_PER_HOUR*12)
hashmap_free(server->leases_by_client_id);
free(server->bound_leases);
- free(server);
-
- return NULL;
+ return mfree(server);
}
int sd_dhcp_server_new(sd_dhcp_server **ret, int ifindex) {
return 0;
}
-int sd_dhcp_server_attach_event(sd_dhcp_server *server, sd_event *event,
- int priority) {
+int sd_dhcp_server_attach_event(sd_dhcp_server *server, sd_event *event, int64_t priority) {
int r;
assert_return(server, -EINVAL);
DHCPPacket *packet, size_t len) {
union sockaddr_union link = {
.ll.sll_family = AF_PACKET,
- .ll.sll_protocol = htons(ETH_P_IP),
+ .ll.sll_protocol = htobe16(ETH_P_IP),
.ll.sll_ifindex = server->ifindex,
.ll.sll_halen = ETH_ALEN,
};
}
static int dhcp_server_send_udp(sd_dhcp_server *server, be32_t destination,
+ uint16_t destination_port,
DHCPMessage *message, size_t len) {
union sockaddr_union dest = {
.in.sin_family = AF_INET,
- .in.sin_port = htobe16(DHCP_PORT_CLIENT),
+ .in.sin_port = htobe16(destination_port),
.in.sin_addr.s_addr = destination,
};
struct iovec iov = {
DHCPRequest *req, DHCPPacket *packet,
int type, size_t optoffset) {
be32_t destination = INADDR_ANY;
+ uint16_t destination_port = DHCP_PORT_CLIENT;
int r;
assert(server);
*/
if (req->message->giaddr) {
destination = req->message->giaddr;
+ destination_port = DHCP_PORT_SERVER;
if (type == DHCP_NAK)
packet->dhcp.flags = htobe16(0x8000);
} else if (req->message->ciaddr && type != DHCP_NAK)
destination = req->message->ciaddr;
if (destination != INADDR_ANY)
- return dhcp_server_send_udp(server, destination, &packet->dhcp,
+ return dhcp_server_send_udp(server, destination,
+ destination_port, &packet->dhcp,
sizeof(DHCPMessage) + optoffset);
else if (requested_broadcast(req) || type == DHCP_NAK)
return dhcp_server_send_udp(server, INADDR_BROADCAST,
- &packet->dhcp,
+ destination_port, &packet->dhcp,
sizeof(DHCPMessage) + optoffset);
else
/* we cannot send UDP packet to specific MAC address when the
if (r < 0)
return r;
- r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
- SD_DHCP_OPTION_ROUTER, 4, &server->address);
- if (r < 0)
- return r;
+ if (server->emit_router) {
+ r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
+ SD_DHCP_OPTION_ROUTER, 4, &server->address);
+ if (r < 0)
+ return r;
+ }
r = dhcp_server_send_packet(server, req, packet, DHCP_OFFER, offset);
if (r < 0)
if (r < 0)
return r;
- r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
- SD_DHCP_OPTION_ROUTER, 4, &server->address);
- if (r < 0)
- return r;
+ if (server->emit_router) {
+ r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
+ SD_DHCP_OPTION_ROUTER, 4, &server->address);
+ if (r < 0)
+ return r;
+ }
if (server->n_dns > 0) {
r = dhcp_option_append(
memcpy(&packet->dhcp.chaddr, chaddr, ETH_ALEN);
- r = dhcp_server_send_udp(server, address, &packet->dhcp,
+ r = dhcp_server_send_udp(server, address, DHCP_PORT_CLIENT,
+ &packet->dhcp,
sizeof(DHCPMessage) + optoffset);
if (r < 0)
return r;
switch(code) {
case SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME:
if (len == 4)
- req->lifetime = be32toh(*(be32_t*)option);
+ req->lifetime = unaligned_read_be32(option);
break;
case SD_DHCP_OPTION_REQUESTED_IP_ADDRESS:
if (len == 4)
- req->requested_ip = *(be32_t*)option;
+ memcpy(&req->requested_ip, option, sizeof(be32_t));
break;
case SD_DHCP_OPTION_SERVER_IDENTIFIER:
if (len == 4)
- req->server_id = *(be32_t*)option;
+ memcpy(&req->server_id, option, sizeof(be32_t));
break;
case SD_DHCP_OPTION_CLIENT_IDENTIFIER:
break;
case SD_DHCP_OPTION_MAXIMUM_MESSAGE_SIZE:
- if (len == 2)
- req->max_optlen = be16toh(*(be16_t*)option) -
- - sizeof(DHCPPacket);
+
+ if (len == 2 && unaligned_read_be16(option) >= sizeof(DHCPPacket))
+ req->max_optlen = unaligned_read_be16(option) - sizeof(DHCPPacket);
break;
}
.msg_controllen = sizeof(cmsgbuf),
};
struct cmsghdr *cmsg;
- int buflen = 0, len;
+ ssize_t buflen, len;
assert(server);
- if (ioctl(fd, FIONREAD, &buflen) < 0)
- return -errno;
- else if (buflen < 0)
- return -EIO;
+ buflen = next_datagram_size_fd(fd);
+ if (buflen < 0)
+ return buflen;
message = malloc(buflen);
if (!message)
return 1;
}
+
+int sd_dhcp_server_set_emit_router(sd_dhcp_server *server, int enabled) {
+ assert_return(server, -EINVAL);
+
+ if (enabled == server->emit_router)
+ return 0;
+
+ server->emit_router = enabled;
+
+ return 1;
+}